Abstract:and Stereoselective Diels-Alder Reaction of Ambident Dienophilic Monothiomaleimide.-Both the C=S and C=C functionalities of the N-arylmonothiomaleimides ( I) undergo a (4 + 2) cycloaddition reaction with variously substituted 1,3-butadienes. The C=S group is generally more reactive than the C=C group, especially toward dienes bearing conjugation and electron-attracting groups providing products with complete regioselectivity and with high stereoselectivity. The C=C groups display a high stereoselectivity but a… Show more
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